Updated September 2025. Covers 1178 reef fish species seen in North Sulawesi, Indonesia. (apps for other parts of Indonesia coming soon). Choose between Basic Mode (300 common fish) and Advanced Mode (all fish). Flip through screens like pages of a book, or find a fish quickly by color or shape. Up to 5 photos per fish showing juveniles, males, females, color variations. Sharpen your fish ID skills with interactive flashcard-style quizzes. Save fish you see in the Log Book.

- Targeted to scuba divers and snorkelers.
- Identify fish by color, shape, family group, scientific name, English name.
- Record fish in Logbook, add notes, share Logbook.
- Improve fish ID skills with flashcard-style quizzes.
- Works great on iPads too.

Created by John Hoover, author of Hawaii's best-selling marine life ID books: The Ultimate Guide to Hawaiian Reef Fishes, and: Hawaii's Sea Creatures, a Guide to Hawaii's Marine Invertebrates. Check them out on Amazon.